Friction coupling or clutch.



No. 879,274. PATENTED FEB. 18, 1908. C. KRAMER.

FRICTION COUPLING 0R CLUTCH.

APPLICATION FILED JAN. 25. 1907.

JWue/Wtoz UNITED srnrns] rnitlsn'r oiainonv CHRISTIAN KRi iM ER, OF FRANKFO RT-ON-THE-MAIN GER-MANY, AS S IGNOR TO FELTEN & GUILLEAUME-LAHM'EYERWERRE ACTIES-GESFLLSGHAFT. OF FRANKFORT-ON-THE-MAIN,

GERMANY.

FRICTION COUPLIN G OR CLUTCH.-

Specification of Letters Patent.

Patented Feb; 18, 1908;

Application filed January 25 1907. Serial No. 354.107.

T all whom it may concern.-

Be it known that l, t lmus'rmx KRAMER. asubjectof the German Emperor, and a. resident of Frankfort-on-thc-Main, Germany,

5. have invented certain new and useful Improvements in Friction (Fouplin or Cl utches,

of which thefollowing is a specification.

TlllS invention relates to friction couplings, or clutches, and especially to electro-mag netic couplings, or clutcl1es,. in \\i1lcltllil7 driving and driven parts of the coupling, or-

clutch, the said ring, or the equivalent, moving on the driven and driving parts when the coupling, or clutch, is slipping and imparting to both parts the heat generated by the fric ti'on.

T hea-ccompanying drawing shows in section an example of an electro magnetic couplin or clutch, constructed in accordance with this invention, in which an annular electro-magnet a, secured to the driving slnift,

serves to draw a disk 1), arranged so as to be 30 capable of sliding on the shaft to be dri en against the friction ring 0 situated between the outer portions of the parts a and 7). It is not essential that the ring 0 be made in one piece, for instance, it may be constituted by 40 several blocks connected by a spider, or by a.

bodj of trellis work, or other connect-ion.

- members.

In the couplings or clutches hitherto known when the coupling is operated, the heat is generated by friction on one annular surface only, but if. in accordance with this invention, a loose intermediate bod be used the action of the coupling is much smoother and the heat generated by friction is imparted to more than the one surface and therefore is more easily dissipated. 5Q

.lthas been heretofore proposed to provide one member of a magnetic clutch with a nonmetallic section, which section was rigidly connected with the clutch member. As above noted, lmwei'er, such aconst-ruction as is illustrated and described herein possesses advantages over a construction in which the nonmetallic body is rigidly connected with oneo! the clutch members. By mountingthc member c loosely with relation to both the clutch 0 members the heat generated by the clutch members rubbing on such section is most readilvdissipated than where said'nonunetallic section is rigid with one of the clutch l claim: I

In a friction clutch. the combination with a metal driving surface and a metal driven surface, of a nbn-metallicbody loosely mounted between and adapted to contact with both said driving and driven surfaces. substan-' tially as and for the purpose described.

I In testimony whereof I have signed my name to this specification in the presence of two subscril'ving witnesses.

tuiusrux KRJtuER.

i t nesses:

llnwix DIPPEL. Micimm. \OLK. 

